The fuse block should be located to the left of the steering column, under the dash. Depending on which Mercury GS you have (sable, topaz, etc.) it should be a relay located in the fuse block.
Check the Horn wiring and if this is good then replace the horn.
You have to replace the fuse for it You have to replace the fuse for it
The mountaineer has a fuse box under the drivers side dash ,and it has two horn fuses , right horn fuse ,and left horn fuse.
see if theres any current going through the fuse or just replace the whole horn
if it is out check fuse if fuse is ok you will need to replace it.
According to the 2006 Mercury Mountaineer owners manual : ( # 14 is a 20 amp fuse for the horn ) * in the fuse panel below the instrument panel on the drivers side *
Horns normally use a breaker, not a fuse.
The fuse for the horn of a 1995 Mercury Sable is located in the engine compartment fuse box. Fuses in the fuse box are labeled with numbers, the number direct what job they handle. The horn relay is in slot 12 and is rated at 20 amps.
1999 mercury sable horn replacement
Horn's should be in the fender wells in the engine compartment.